Embattled comedian Bill Cosby has filed suit against a woman who has accused him of sexually assaulting her at the Playboy Mansion in California when she was 15.

The funnyman, who has refused to address any of the decades-old sexual misconduct allegations brought against him in the past month, is suing Judy Huth, who claims he got her drunk and then had sex with her in 1974.

Cosby insists she's a liar who attempted to extort him and then raised the price for her silence as more women came forward with assault claims.

In his legal documents, obtained by TMZ.com, Cosby claims Huth's lawyer approached his attorney, Marty Singer, last month and made "ominous references to criminal penalties", demanding $100,000 for his client's silence. That figure allegedly increased to $250,000 in the weeks that followed.

Cosby states Huth tried to sell her story to the tabloids a decade ago.

He also dismisses her claims that she played "a drinking game" with the comedian, insisting he is "a life-long non-drinker".

Cosby is demanding the dismissal of Huth's civil lawsuit against him, which she filed in Los Angeles earlier this week.

Meanwhile, Cosby has suffered another blow in the ongoing sexual abuse allegations scandal - U.S. Navy officials have revoked his title as honorary petty officer. The military leaders state the allegations conflict with their "core values". Cosby's legal representatives continue to deny the claims against the comedian.